Changes in segment coordination variability and the impacts of the lower limb across running mileages in half marathons:Implications for running injuries

作     者：Tony Lin-Wei Chen Duo Wai-Chi Wong Yan Wang Qitao Tan Wing-Kai Lam Ming Zhang Tony Lin-Wei Chen;Duo Wai-Chi Wong;Yan Wang;Qitao Tan;Wing-Kai Lam;Ming Zhang

作者机构：Department of Biomedical EngineeringFaculty of EngineeringHong Kong Polytechnic UniversityHong Kong SAR 999077China Li Ning Sports Science Research CenterLi Ning(China)Sports Goods Co.LtdBeijing 101111China Hong Kong Polytechnic University Shenzhen Research InstituteShenzhen 518057China Department of KinesiologyShenyang Sports InstituteShenyang 110102China 

出 版 物：《Journal of Sport and Health Science》 (运动与健康科学（英文）)

年 卷 期：2022年第11卷第1期

页      面：67-74页

核心收录：

学科分类：0403[教育学-体育学] 04[教育学] 

基　　金：supported by General Research Funds granted by the Hong Kong Research Grant Council(#Poly U152065/17E) funding from the National Natural Science Foundation of China(#11732015) 

主　　题：Coupling angle Endurance running Motion capture analysis Musculoskeletal modeling Vector coding technique 

摘      要：Background:Segment coordination variability(CV)is a movement pattern associated with running-related *** can also be adversely affected by a prolonged ***,research on this topic is currently *** purpose of this study was to investigate the effects of a prolonged run on segment CV and vertical loading rates during a treadmill half ***:Fifteen healthy runners ran a half marathon on an instrumental treadmill in a biomechanical *** kinematic and kinetic data were collected every 2 km(from 2 km until 20 km),and the data were processed by musculoskeletal *** CVs were computed from the angle-angle plots of selected pelvis-thigh,thigh-shank,and shank-rearfoot couplings using a modified vector coding *** loading rate of vertical ground reaction force was also calculated.A one-way MANOVA with repeated measures was performed on each of the outcome variables to examine the main effect of running ***:Significant effects of running mileage were found on segment CVs(p≤0.010)but not on loading rate(p=0.881).Notably,during the early stance phase,the CV of pelvis frontal thigh frontal was significantly increased at 20 km compared with the CV at 8 km(g=0.59,p=0.022).The CV of shank transverse *** frontal decreased from 2 km to 8 km(g=0.30,p=0.020)but then significantly increased at both 18 km(g=0.05,p0.001)and 20 km(g=0.36,p0.001).Conclusion:At the early stance,runners maintained stable CVs on the sagittal plane,which could explain the unchanged loading rate throughout the half ***,increased CVs on the frontal/transverse plane may be an early sign of fatigue and indicative of possible injury *** studies are necessary for conclusive statements in this regard.